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Write a DataFrame to the binary Feather format.
Parameters
----------
df : DataFrame
path : str, path object, or file-like object
{storage_options}
**kwargs :
Additional keywords passed to `pyarrow.feather.write_feather`.
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Load a feather-format object from the file path.
Parameters
----------
path : str, path object, or file-like object
String, path object (implementing ``os.PathLike[str]``), or file-like
object implementing a binary ``read()`` function. The string could be a URL.
Valid URL schemes include http, ftp, s3, and file. For file URLs, a host is
expected. A local file could be: ``file://localhost/path/to/table.feather``.
columns : sequence, default None
If not provided, all columns are read.
use_threads : bool, default True
Whether to parallelize reading using multiple threads.
{storage_options}
dtype_backend : {{'numpy_nullable', 'pyarrow'}}, default 'numpy_nullable'
Back-end data type applied to the resultant :class:`DataFrame`
(still experimental). Behaviour is as follows:
* ``"numpy_nullable"``: returns nullable-dtype-backed :class:`DataFrame`
(default).
* ``"pyarrow"``: returns pyarrow-backed nullable :class:`ArrowDtype`
DataFrame.
.. versionadded:: 2.0
Returns
-------
type of object stored in file
Examples
--------
>>> df = pd.read_feather("path/to/file.feather") # doctest: +SKIP
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